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对SABRE发动机吸气模式下氦气闭式热力循环系统进行了分析,得知该循环采用布莱顿循环。根据来流马赫数的变化,计算出了SABRE发动机在吸气模式下氦气闭式循环中各部件的运行参数,确定了影响该循环的主要参数。结果表明:氦气闭式循环在SABRE发动机吸气模式下,通过换热器实现了高温热源与低温源之间的热量传递,该循环输出了大部分功用来带动空气压气机。在低温热源温度确定的情况下,提高换热器HX4的性能和提高氦气涡轮T1前的温度,可以增加空气路有效功的输出。
The helium closed thermodynamic cycle system under SABER engine suction mode was analyzed and it was learned that the cycle adopted the Brighton cycle. According to the Mach number of the incoming flow, the operating parameters of each component of the closed cycle of the helium gas in the suction mode of the SABER engine are calculated, and the main parameters influencing the cycle are determined. The results show that the helium closed loop heat transfer between the high temperature heat source and the low temperature source through the heat exchanger in the SABER engine suction mode, the cycle output most of the functions to drive the air compressor. When the temperature of the low-temperature heat source is fixed, the output of the effective work of the air channel can be increased by improving the performance of the heat exchanger HX4 and increasing the temperature before the helium turbine T1.